TWM498318U - Stacked type thin film light conversion device - Google Patents

Description

Stacked film light conversion device

The present invention relates to a light conversion device, and more particularly to a stacked film optical conversion device.

Non-visible light is light that cannot be directly perceived by the human eye, such as infrared light, ultraviolet light, etc. Although non-visible light cannot be directly discriminated by the human eye, its range of application can be quite extensive. For example, infrared light can be used. In military, industrial, scientific, medical and other fields, such as infrared thermal imaging cameras can detect changes in blood flow in the skin, infrared light guidance is also commonly used in missile navigation, thermal imaging and night vision mirrors.

Among them, the technology of night vision goggles is mainly an auxiliary observation tool that can be directly recognized by the human eye by using infrared light to convert into visible light, and can be divided into low-light night vision goggles and infrared night vision goggles according to imaging technology. In the case of low-light night vision goggles, it is mainly to enhance the weak light so that the user can clearly observe the image. The infrared night vision goggles can be divided into active and passive. The active infrared night vision goggles are activated by the night vision goggles to emit an infrared light, illuminate the target object to be observed, and then reflect the infrared light reflected by the target object. Converted into visible light; passive infrared night vision mirrors are converted to visible light by detecting infrared rays radiated around the environment or by the target object itself. And imaging.

According to the above description of the imaging technique of the infrared light night vision mirror, the conventional infrared light night vision mirror is mainly configured to sequentially include an objective lens along an optical axis direction thereof, an optical amplifying tube connecting the objective lens, and a link. The eyepiece of the light amplifying tube. The light amplifying tube comprises a tube body, and sequentially includes a photocathode disposed in the tube body, a microchannel plate (MCP) disposed in the tube body, and a photo in the optical axis direction. a phosphor layer disposed in the tube body.

The imaging principle of the infrared night vision goggle is that the infrared night vision goggles first receives a bias voltage to generate a potential difference in the optical amplifying tube, and the external infrared light is concentratedly incident on the light by the objective lens. Amplifying the inside of the tube; then, the photocathode transmits a plurality of photons of the infrared light into a plurality of first electrons by the photoelectric conversion effect, and accelerates the impact of the first electrons through the potential difference in the tube And releasing a second electron having a number greater than the number of the first electrons; and finally, the second electrons strike the phosphor layer to generate a visible light source, and the image is focused by the eyepiece. That is to say, the current imaging of infrared night vision mirrors mainly relies on generating a large amount of second electrons, and the second electrons are used to strike the phosphor layer, thereby generating a visible light source for imaging, and therefore, in order to generate sufficient second electrons. To increase the brightness of the imaging light source to enhance the performance of the infrared night vision goggles. The optical amplification tube not only needs to be in a vacuum state, but also has sufficient length to increase the mean free path of the electrons, and A voltage high enough to cause the electrons to accelerate against the microchannel plate, and the amount of release is greater than The second electron is multiplied by the first electron. Therefore, the existing infrared night vision goggles have the disadvantage of being bulky and causing inconvenience in carrying.

Accordingly, it is an object of the present invention to provide a stacked thin film optical conversion device which is thin and has high luminance.

Therefore, the stacked thin film optical conversion device of the present invention can emit a light source different from the wavelength of the ambient light after receiving the voltage and the ambient light, and the stacked thin film optical conversion device comprises a first penetrating electrode plate and a first organic a light emitting unit, an organic photovoltaic unit, a second organic light emitting unit, and a second penetrating electrode plate.

The first organic light emitting unit is disposed on a surface of the first penetrating electrode plate.

The organic photovoltaic unit is disposed on a surface of the first organic light emitting unit, and is capable of being excited to emit a plurality of pairs of second carriers after absorbing ambient light, and each pair of second carriers has a positive carrier and a negative carrier.

The second organic light emitting unit is disposed on a surface of the organic photovoltaic unit.

The second penetrating electrode plate is disposed on a surface of the second organic light emitting unit.

Wherein, the first and second penetrating electrode plates can cooperate to provide a voltage, the voltage can provide a plurality of pairs of first carriers, and each pair of first carriers has a positive carrier and a negative carrier, the voltage of One of the positive and negative electrodes is electrically connected to the first penetrating electrode plate, and the positive and negative electrodes of the voltage are One is electrically connected to the second penetrating electrode plate; one of the positive and negative carriers of each pair of first carriers is correspondingly injected into the first organic light emitting unit according to the voltage, and each pair is first The other of the positive and negative carriers of the carrier is correspondingly injected into the second organic light emitting unit according to the voltage; the positive and negative carriers of the pair of second carriers generated by the organic photovoltaic unit are transparent The potential difference generated by the voltage is respectively moved toward the first and second organic light emitting units, and is respectively combined with the first carrier electrically opposite to the first and second organic light emitting units to make the first and second organic light emitting units The light source is emitted.

The utility model has the advantages that the novel stacked thin film light conversion device is provided, and the light source emitted by the first and second organic light emitting units can not only make the image clearer, but also can effectively reduce the volume of the light conversion device. User carried.

1‧‧‧First penetrating electrode plate

11‧‧‧First substrate

12‧‧‧First penetrating electrode layer

2‧‧‧First organic light-emitting unit

21‧‧‧First positive carrier injection layer

22‧‧‧First transmission barrier

23‧‧‧First luminescent layer

24‧‧‧second transmission barrier

25‧‧‧First negative carrier injection layer

3‧‧‧Organic Photovoltaic Unit

4‧‧‧Second organic light-emitting layer

41‧‧‧Second positive carrier injection layer

42‧‧‧ third transmission barrier

43‧‧‧second luminescent layer

44‧‧‧fourth transmission barrier

45‧‧‧Second negative carrier injection layer

5‧‧‧Second penetrating electrode layer

51‧‧‧second substrate

52‧‧‧Second penetrating electrode layer

V‧‧‧ voltage

Other features and effects of the present invention will be apparent from the following description of the drawings. FIG. 1 is a schematic cross-sectional view showing a first embodiment of the stacked thin film optical conversion device of the present invention; A cross-sectional view showing a second embodiment of the stacked thin film optical conversion device of the present invention; FIG. 3 is a graph of current density versus voltage and gain value, illustrating a specific example of the stacked thin film optical conversion device of the present invention. For example, the relationship between the current density and the voltage of the infrared light and the unirradiated infrared light; FIG. 4 is a brightness versus voltage curve illustrating the novel stacked film. This specific example of the light conversion device and the comparative example show the relationship between the luminance and the voltage after the infrared ray is irradiated.

Before the present invention is described in detail, it should be noted that in the following description, similar elements are denoted by the same reference numerals. The technical content, features and effects of the present invention will be apparent in the following detailed description.

It should be noted that the novel stacked thin film optical conversion device can be applied to infrared light night vision mirrors, ultraviolet light detectors, or medical amblyopia appliances, etc., which need to convert non-visible light into visible light or enhance the brightness of visible light. Conversion device. In this embodiment, an infrared light night vision mirror is taken as an example, but is not limited to this application.

Referring to FIG. 1, a first embodiment of the stacked thin film optical conversion device of the present invention is described by taking an infrared light night vision mirror that can generate a predetermined image after receiving the voltage V and the infrared light.

The first embodiment comprises a first penetrating electrode plate 1, a first organic light emitting unit 2, an organic photovoltaic unit 3, a second organic light emitting unit 4, and a second penetrating electrode plate 5.

In the first embodiment of the present invention, the first organic light emitting unit 2, the organic photovoltaic unit 3, and the second organic light emitting unit 4 are disposed between the first and second penetrating electrode plates 1, 5, and The surface of the penetrating electrode 1 sequentially forms the first organic light emitting unit 2, the organic photovoltaic unit 3, and the second organic light emitting unit 4.

The first penetrating electrode plate 1 includes a light transmissive first substrate 11 and a first penetrating electrode layer 12 formed between the first substrate 11 and the first organic light emitting unit 2; The electrode plate 5 includes a light transmissive second substrate 51 and a second penetrating electrode layer 52 formed between the second substrate 51 and the second organic light emitting unit 4.

Preferably, the first and second through electrode layers 12 and 52 are made of a transparent conductive material, and may be selected from Indium tin oxide (ITO), Indium zinc oxide (IZO), and oxidation. A single film composed of any one of zinc (Zinc oxide, ZnO) and indium gallium zinc oxide (IGZO) may also be symmetric or asymmetric by metal, organic compound, and inorganic compound. A form of permeable composite film layer. For example, the structure of the composite film layer may be in the form of "inorganic compound/metal/inorganic compound", "organic compound/metal/organic compound", or "inorganic compound/metal/organic compound", wherein common compound The film layers are: BCP (bathocuproine) / Ag / BCP, WO ₃ / Ag / WO ₃ , ITO / Ag / ITO, MoO ₃ / Ag / MoO ₃ , SiO ₂ / Ag / SiO ₂ , NPB ( N, N' - Bis(naphthalen-1-yl) -N,N'- bis(phenyl)benzidine)/Ag/NPB. In the first embodiment, the first penetrating electrode layer 12 is a single film using a relatively crystalline ITO, and the second penetrating electrode layer 52 is a composite film layer using WO ₃ /Ag/WO ₃ . For example, the first substrate 11 and the second substrate 51 are glass substrates.

The first organic light emitting unit 2 is disposed between the first penetrating electrode plate 1 and the organic photovoltaic unit 3, including the first penetrating electrode plate 1 a first positive type carrier injection layer 21, a first transmission barrier layer 22, a first light-emitting layer 23, a second transmission barrier layer 24, and a first negative-type carrier injection layer. 25.

The organic photovoltaic unit 3 is made of a material selected from the group consisting of absorbing visible light and invisible wavelength bands: tin phthalocyanine (SnPc), boron chloride phthalocyanine (SubPc), naphthalene Phthalocyanine (SubNc), phthalocyanine aluminum chloride (ClAlPc), phthalocyanine titanium oxide (TiOPc), copper phthalocyanine (CuPc), zinc phthalocyanine (ZnPc), hexacene (Hexacene), pentacene (Pentacene) And Tetracene, Anthracene, Carbon 60 (C ₆₀ ), and Carbon 70 (C ₇₀ ), but are not limited thereto, and may be a mixture of the foregoing materials. It should be noted that, since the stacked thin film light conversion device of the present invention is applied to an infrared light night vision mirror, the organic photovoltaic unit 3 excites a plurality of pairs of carriers after absorbing infrared light, and therefore, in the first embodiment The organic photovoltaic unit 3 is exemplified by a film formed by mixing aluminum phthalocyanine and carbon 70 with each other.

The second organic light emitting unit 4 is disposed between the second penetrating electrode plate 5 and the organic photovoltaic unit 3, and includes a second positive type carrier injection layer 41, which is sequentially formed by the surface of the organic photovoltaic unit 3. The third transmission blocking layer 42 , a second luminescent layer 43 , a fourth transmission blocking layer 44 , and a second negative carrier injection layer 45 .

It should be noted that the first and second organic light emitting units 2 and 4 are organic light emitting diode structures in which two penetrating electrode layers are generally omitted, and the color lights emitted by the light emitting diodes may be the same or different due to The first embodiment of the present invention is applied to a night vision goggle. Therefore, preferably, the first and second organic light-emitting units 2, 4 emit a green light source in cooperation with a most sensitive band of the human eye, that is, the first The first and second light-emitting layers 23, 43 of the first and second organic light-emitting units 2, 4 are made of an organic light-emitting material that emits green light. In the first embodiment, the first and second luminescent layers 23, 43 are made of a main illuminant material doped with a guest illuminant material, wherein the first and second luminescent layers 23, 43 are The illuminant is the same material as the guest illuminant, and the main illuminant material is selected from the group consisting of 4,4'-N (N-dicarbazole-biphenyl, CBP). The guest illuminant material is exemplified by using Tris[2-phenylpyridinato-C ₂ ,N]iridium(III), Ir(ppy) ₃ ), but is not limited thereto. Since the materials of the first and second organic light-emitting units 2, 4 are selected and matched with the prior art in the field of organic light-emitting diodes, and are not technical features of the present invention, they will not be further described.

In detail, as shown in FIG. 1 , in the first embodiment of the present invention, the positive electrode of the voltage V is electrically connected to the first penetrating electrode layer 12 of the first penetrating electrode plate 1 , and the voltage V The negative electrode is electrically connected to the second penetrating electrode layer 52 of the second penetrating electrode plate 5, the voltage V can provide a plurality of pairs of first carriers, and each pair of first carriers has a positive carrier and a negative Type carrier. Therefore, the positive carrier of each pair of first carriers of the voltage V is injected into the first organic light emitting unit 2 by the first through electrode layer 12, and is transmitted through the first positive carrier injection layer 21, A transmission blocking layer 22 and the first luminescent layer 23 are such that the positive carriers of the respective first carriers pass between the first luminescent layer 23 and the second transmission blocking layer 24 through the respective layers. on the other hand, The negative carrier of each pair of first carriers of the voltage V is injected into the second organic light emitting unit 4 from the second through electrode layer 52, and is passed through the second negative carrier injection layer 45, and the fourth The barrier layer 44 and the second luminescent layer 43 are transported, and the negative carriers of the respective pairs of first carriers are allowed to pass between the interfaces of the second luminescent layer 43 and the third transport blocking layer 42 through the respective layers. At this time, when the infrared light illuminates the organic photovoltaic unit 3 to excite a plurality of pairs of second carriers, each pair of second carriers has a positive carrier and a negative carrier, and each pair of the second carrier is positive. The negative carrier is separated by the potential difference generated by the voltage V, and is respectively transmitted in the direction of the first and second organic light emitting units 2 and 4, and the negative carrier of each pair of the second carrier passes the first a negative carrier injection layer 25 and the second transmission barrier layer 24, and a positive carrier of each pair of second carriers passes through the second positive carrier injection layer 41 and the third transmission barrier layer 43 And a positive carrier of each pair of first carriers staying between the interface of the first light-emitting layer 23 and the second transmission barrier layer 24 and staying at the second light-emitting layer 43 and the third light-transfer barrier layer 42 respectively The negative carriers of each pair of first carriers of the interface are combined, and the first and second light-emitting layers 23, 43 emit a green light source.

Specifically, when an object is actually observed by using the first embodiment of the present invention, the imaging principle is that the organic photovoltaic unit 3 excites the formation of the second carrier in the region where the infrared light emitted by the target is received. And transmitting to the first and second organic light-emitting units 2, 4 such that the first and second light-emitting layers 23, 43 emit green light, that is, the regions where the first and second light-emitting layers 23, 43 emit light are Corresponding to the area where the organic photovoltaic unit 3 receives the infrared light, and the area that does not receive the infrared light does not emit light, or the brightness of the light is extremely high. Therefore, the green light region emitted by the first and second light-emitting layers 23 and 43 can present an image of the target, and the target can be directly observed.

In addition, the stacked thin film optical conversion device of the present invention has a double-layer light emitting structure of the first and second organic light emitting units 2, 4. Therefore, when the first embodiment of the present invention is actually applied to a night vision mirror, only The weak infrared light intensity allows the first and second light-emitting layers 23, 43 to emit a green light source, and a night vision image is observed, and the double-layer light-emitting structure can effectively increase the brightness and make the image more effective. Clear.

Referring to FIG. 2, a second embodiment of the stacked thin film optical conversion device of the present invention is substantially the same as the first embodiment, except that the film layer stack of the first and second organic light emitting units of the second embodiment is different. The sequence is opposite to the first embodiment, and the positive electrode of the voltage V is electrically connected to the second penetrating electrode plate 5, and the negative electrode of the voltage V is electrically connected to the first penetrating electrode plate 1.

In order to make the effect of the stacked thin film optical conversion device of the present invention clearer, a specific example and a comparative example are respectively described. This specific example adopts the structure of the first embodiment of the present invention, and the comparative example is substantially The same as this specific example, the difference is that the first organic light-emitting unit 2 is not provided in the comparative example.

Referring to FIG. 3, the voltage and current density obtained by measuring the specific example and the comparative example in the environment of irradiating infrared light (indicated by IR) and not irradiating infrared light (indicated by Dark) are shown; wherein, the gain value ( Gain) is a current ratio (I _IR /I _Dark ) when the infrared light is irradiated to the specific example or the comparative example when the infrared light is not irradiated.

As can be seen from FIG. 3, the voltage detection limits of the specific example and the comparative example are about 20 V and 6 V, respectively. Therefore, according to the result of FIG. 3, the specific example and the comparative example are used to illuminate the infrared light and detect the current. The density is about 2 mA/cm ² and 1 mA/cm ^{2 respectively} , and the current density is high, indicating that the photon utilization rate is also increased, and the brightness thereof can be effectively improved. Thus, the stacked thin film optical conversion device of the present invention can be known. Can effectively improve the utilization of photons.

Referring to FIG. 4, FIG. 4 is a relationship between the voltage and the brightness obtained by measuring the infrared light in the specific example and the comparative example. As is clear from FIG. 4, the luminances of the specific examples and the comparative examples at the voltage measurement limit were 1150 cd/m ² and 600 cd/m ² , respectively, and the luminance of the specific example was significantly higher than that of the comparative example.

It is to be noted here that the embodiments of the present invention are exemplified only by infrared night vision goggles, which are not limited to the application of infrared night vision goggles. That is to say, according to the operation mechanism of the carrier of the embodiments of the present invention, the appropriate material is selected according to the wavelength band that the organic photovoltaic unit 3 and its first and second light-emitting layers 23 and 43 can emit, that is, The stacked type thin film optical conversion device of the embodiments can be applied to a medical amblyopia aligner, or an ultraviolet light detector. In the case of amblyopia corrector, the organic photovoltaic unit 3 can be selected from materials that absorb the full band, and then select appropriate materials of the first and second light-emitting layers 23, 43 according to the light suitable for the user; and the ultraviolet light detector The organic photovoltaic unit 3 can be selected from materials that absorb the ultraviolet light band.

In summary, the stacked thin film light conversion device of the present invention is formed by stacking and stacking the first through electrode plate 1, the first organic light emitting unit 2, the organic photovoltaic unit 3, and the second organic light emitting unit 4, And the second penetrating electrode plate 5 can effectively increase the sharpness of the image due to the improvement of the overall brightness, and the composite mechanism of the first and second carriers is used to make the stacked film optical conversion device of the present invention only need Receiving a small amount of light, it can emit light to generate a predetermined image; in addition, the novel stacked thin film optical conversion device is also suitable for mass production, and can be widely applied in various fields, and has great market development value and industrial utilization, so It is indeed possible to achieve the purpose of this new type.

However, the above description is only for the embodiments of the present invention, and the scope of the present invention cannot be limited thereto, that is, the simple equivalent changes and modifications made by the present patent application scope and the contents of the patent specification are still It is within the scope of this new patent.

1‧‧‧First penetrating electrode plate

11‧‧‧First substrate

12‧‧‧First penetrating electrode layer

2‧‧‧First organic light-emitting unit

21‧‧‧First positive carrier injection layer

22‧‧‧First transmission barrier

23‧‧‧First luminescent layer

24‧‧‧second transmission barrier

25‧‧‧First negative carrier injection layer

3‧‧‧Organic Photovoltaic Unit

4‧‧‧Second organic light-emitting layer

41‧‧‧Second positive carrier injection layer

42‧‧‧ third transmission barrier

43‧‧‧second luminescent layer

44‧‧‧fourth transmission barrier

45‧‧‧Second negative carrier injection layer

5‧‧‧Second penetrating electrode layer

51‧‧‧second substrate

52‧‧‧Second penetrating electrode layer

V‧‧‧ voltage

Claims (8)

A stacked thin film optical conversion device capable of converting and emitting a light source having a wavelength different from ambient light after receiving voltage and ambient light, the stacked thin film optical conversion device comprising: a first penetrating electrode plate; and a first organic light emitting device a unit disposed on the surface of the first penetrating electrode plate; an organic photovoltaic unit disposed on the surface of the first organic light emitting unit to be excited to emit a plurality of pairs of second carriers after absorbing ambient light, each pair of second The carrier has a positive carrier and a negative carrier; a second organic light emitting unit is disposed on the surface of the organic photovoltaic unit; and a second penetrating electrode plate is disposed on the surface of the second organic light emitting unit Wherein, the first and second penetrating electrode plates can cooperate to provide a voltage, the voltage can provide a plurality of pairs of first carriers, and each pair of first carriers has a positive carrier and a negative carrier, the voltage One of the positive and negative electrodes is electrically connected to the first penetrating electrode plate, and the other of the positive and negative electrodes of the voltage is electrically connected to the second penetrating electrode plate; each pair of first carriers One of the positive and negative carriers It is based on the first organic light emitting unit corresponding to the injection voltage, and the positive, negative carrier, wherein the other of each pair of first carrier is injected into the second organic light emitting unit based on the voltage corresponding to; The positive and negative carriers of each pair of second carriers generated by the organic photovoltaic unit are respectively movable toward the first and second organic light emitting units by a potential difference generated by the voltage, and respectively associated with the first and second organic light emitting The first carriers that are electrically opposite in the unit are combined to cause the first and second organic light emitting units to emit light. The stacked thin film optical conversion device of claim 1, wherein the positive electrode of the voltage is electrically connected to the first penetrating electrode plate, and the negative electrode of the voltage is electrically connected to the second penetrating electrode plate. The stacked thin film light conversion device of claim 2, wherein the first organic light emitting unit comprises a first positive type carrier injection layer sequentially formed on a surface of the first penetrating electrode plate, and a first a transmission barrier layer, a first luminescent layer, a second transmission blocking layer, and a first negative carrier injection layer. The stacked thin film light conversion device according to claim 2, wherein the second organic light emitting unit comprises a second positive type carrier injection layer and a third transfer barrier layer sequentially formed on a surface of the organic photovoltaic unit. a second luminescent layer, a fourth transmission blocking layer, and a second negative carrier injection layer. The stacked thin film optical conversion device of claim 1, wherein the positive electrode of the voltage is electrically connected to the second penetrating electrode plate, and the negative electrode of the voltage is electrically connected to the first penetrating electrode plate. The stacked thin film light conversion device according to claim 5, wherein the first organic light emitting unit comprises a first negative type carrier injection layer sequentially formed on a surface of the first penetrating electrode plate, and a first Transmission barrier a light emitting layer, a second transport barrier layer, and a first positive carrier injection layer. The stacked thin film light conversion device according to claim 5, wherein the second organic light emitting unit comprises a second negative type carrier injection layer and a third transfer barrier layer sequentially formed on a surface of the organic photovoltaic unit. a second luminescent layer, a fourth transmission blocking layer, and a second positive carrier injection layer. The stacked thin film optical conversion device of claim 1, wherein the first penetrating electrode plate comprises a first substrate, and a first penetration formed between the first substrate and the first organic light emitting unit An electrode layer; the second penetrating electrode plate includes a second substrate, and a second penetrating electrode layer formed between the second substrate and the second organic light emitting unit.